#include <time.h>
#include <stdio.h>
#include <unistd.h>

int main()
{
  printf("%ld\n",clock() );
  sleep(2);
  printf("%ld\n",CLOCKS_PER_SEC);
  printf("%ld\n",clock() );
  printf("%d\n",sizeof(long) );
  return 0;
}
